JBA 40-2653 User Manual

INSTALLATION INSTRUCTIONS

** Installation recommendation: JBA recommends in most case that the vehicle be taken to a reputable exhaust shop for installation.

40-2653

‘65-‘70 Mustang V8 with JBA H-pipe

Parts List: A. P/S intermediate pipe 1 B. D/S intermediate pipe 1 C. JBA muffler 2 D. 90º bend 2 E. P/S tail pipe 1 F. D/S tail pipe 1 G. 2-1/2” Clamp 8 H. Universal Muffler hanger 2 I. Tailpipe hanger 2

J. Turnout Start:

Typically the stock exhaust system on early cars is long gone. These instructions contemplate the installation of a new JBA Exhaust System after the original exhaust system has been removed. This system is designed to work with a JBA HPipe built for your application.

1. Remove and inventory the JBA Exhaust System.

2. Disconnect the negative battery cable and allow the exhaust system to completely cool.

3. With the H-Pipe installed, and all exhaust removed from the car, slip the intermediate pipes onto the H-pipe. Orient them so the small single bend is flat, and pointing to the outside of the car. The int. pipe should be just below the seat belt bolt. If you have replaced your factory bolts, it may be necessary to shorten an aftermarket bolt. Allow at least a quarter inch clearance on the bolt.

4. Slip a muffler clamp on each exhaust pipe. Slip the muff ers on to the Int. pipe. Align mufflers to be flat with the floor, maintain alignment with forward bend of the intermediate pipe. The muffler should have a min mum 1/2” clearance to the front floor hump, and a minimum 11/4” clearance on top.

5. Support the muffler temp rarily. Universal hangers are supplied with the kit, or you can adapt your factory dual hangers. If using the universal hangers, self-tapping screws and fender washers are supplied. Position the hanger on

the outlet tube of the muffler. Mark the floorboard at onto the S/T screw, slip the screw through the hanger at whichever hole you marked, slip another fender washer on the screw, and attach the hanger to the floor pan. Fasten the hanger to the muffler using a supplied clamp. Do both sides; be sure to match muffler heights

6. The rear tail pipe hangers bolt through the rear frame where the shipping tie-down brackets bolt on. If your car has these brackets, they must be removed. Assemble the grommet onto the strap hanger. Slip a fender washer onto the 3 1/2” bolt. Slip the bolt through the frame at the forward hole. Slip the hanger/grommet assy. onto the bolt. Add another fender washer and a lock nut and tighten until grommet just starts to compress.

7. Slip the tailpipes over the axle. Install the small 90º bends, long side into the muffle . Drop the tail pipe onto the 90* bend. Align the tailpipe so that it fits into the notch in the floor pan, just inside of the shock. Allow at least 1/2” clearance on the floo .

8. On 2654 systems, position the end of the tailpipe approximately 3/4” below the valance panel and approximately 1/2” forward from the edge. (Adjust front to rear position at back of muffle .) “Atta justed” to clear the 2 1/2” pipe and clamp. Usually a good smack with your hand against the tailpipe into the gas tank will gain the necessary clearance.

washer

9. On 2653 systems, follow above instructions except position tailpipe tips through holes in rear valance. Align and adjust for depth. Secure with clamp to hanger.

10. Very Important- Once the tailpipes are secured with the rear clamp, the tails of the clamp bolts must be trimmed off so they don’t hang up on the leaf spring.

11. Check the clearance of exhaust to floor and rear axle along the complete system. Securely tighten all clamps. Tack weld all slip joints

NOTES:

1.) All exhaust systems expand about 1” rearward whent exhaust temperature rises.

To get more power out of your Mustang, JBA offers easy to install Long tube and Mid-length headers. For more information about these and other quality performance products from JBA visit us online at www.jbaheaders.com

JBA recommends taking the vehicle to a muff er shop and having all slip connections tack welded. 10.16.06